ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Measurements of the viscosities of a number of polymer-solvent systems have shown that an exponential expression, η = η0e[η]c, is applicable in the Concentration range up to c = 0.13 g./lOO cc. of solvent to within the precision of the experimental measurements. This exponential equat.ion lends itself readily to the determination of the intrinsic viscosity [η] from a single determination of η/η0 and is therefore of great use in determining molecular weights of high polymers from a Houwink-type expression. At higher concentrations, departures from the exponential equation occur, but agreement remains reasonably good up to a con- centration of 1 g./l00 cc. of solvent. The experimental results are compared with those predicted by the exponential expression and with those expected from a Huggins-type equation in which k′ = 0.5, which corresponds to the first two terms of the expanded form of the exponential.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1960.070030801
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